64438028 has 6 divisors (see below), whose sum is σ = 112766556. Its totient is φ = 32219012.

The previous prime is 64438027. The next prime is 64438039. The reversal of 64438028 is 82083446.

It is not an unprimeable number, because it can be changed into a prime (64438027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8054750 + ... + 8054757.

It is an arithmetic number, because the mean of its divisors is an integer number (18794426).

Almost surely, 2^64438028 is an apocalyptic number.

It is an amenable number.

64438028 is a deficient number, since it is larger than the sum of its proper divisors (48328528).

64438028 is a wasteful number, since it uses less digits than its factorization.

64438028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16109511 (or 16109509 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 64438028 is about 8027.3300667158. The cubic root of 64438028 is about 400.9104843067.

The spelling of 64438028 in words is "sixty-four million, four hundred thirty-eight thousand, twenty-eight".